#docker

### Summary The traefik docker container uses 100% CPU when it serves as its own backend, which is an automatically generated route resulting from the Docker integration in the default configuration. ### Details While attempting to set up Traefik to handle traffic for Docker containers, I observed in the webUI a rule with the following information: `Host(traefik-service) | webwebsecure | traefik-service@docker | traefik-service` I assumed that this is something internal; however, I wondered why it would have a host rule on the web entrypoint configured. So I have send a request with that hostname with `curl -v --resolve "traefik-service:80:xxx.xxx.xxx.xxx" http://traefik-service`. That made my whole server unresponsive. I assume the name comes from a docker container with that name, traefik itself: ``` localhost ~ # docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS ...

### Summary When a request is sent to Traefik with a URL fragment, Traefik automatically URL encodes and forwards the fragment to the backend server. This violates the RFC because in the origin-form the URL should only contain the absolute path and the query. When this is combined with another frontend proxy like Nginx, it can be used to bypass frontend proxy URI-based access control restrictions. ### Details For example, we have this Nginx configuration: ``` location /admin { deny all; return 403; } ``` This can be bypassed when the attacker is requesting to /#/../admin This won’t be vulnerable if the backend server follows the RFC and ignores any characters after the fragment. However, if Nginx is chained with another reverse proxy which automatically URL encode the character # (Traefik) the URL will become /%23/../admin And allow the attacker to completely bypass the Access Restriction from the Nginx Front-End proxy. Here is a diagram to summarize the attack: ![i...

Traefik is an open source HTTP reverse proxy and load balancer. The traefik docker container uses 100% CPU when it serves as its own backend, which is an automatically generated route resulting from the Docker integration in the default configuration. This issue has been addressed in versions 2.10.6 and 3.0.0-beta5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Traefik is an open source HTTP reverse proxy and load balancer. When a request is sent to Traefik with a URL fragment, Traefik automatically URL encodes and forwards the fragment to the backend server. This violates RFC 7230 because in the origin-form the URL should only contain the absolute path and the query. When this is combined with another frontend proxy like Nginx, it can be used to bypass frontend proxy URI-based access control restrictions. This vulnerability has been addressed in versions 2.10.6 and 3.0.0-beta5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

kkFileView v4.3.0 is vulnerable to Incorrect Access Control.

October CMS version 3.4.0 suffers from a persistent cross site scripting vulnerability when a user has article posting capabilities.

October CMS version 3.4.0 suffers from a persistent cross site scripting vulnerability when a user has category-creating capabilities.

October CMS version 3.4.0 suffers from a persistent cross site scripting vulnerability when a user has blog-creating capabilities.

October CMS version 3.4.0 suffers from a persistent cross site scripting vulnerability when a user has author posting capabilities.

October CMS version 3.4.0 suffers from a persistent cross site scripting vulnerability where a user has the ability to edit the landing/about page.